Head-to-head · profiles checked Oct 1, 2026
Perplexity wins when the answer lives on the live web: it searches in real time and cites every answer. Gemini Notebook (formerly NotebookLM) wins when answers should come only from your uploaded sources, with Audio Overviews, Flashcards and Slides. Perplexity and Gemini Notebook both have a free tier; Gemini Notebook allows 50 free sources per notebook.
Perplexity$10/mo (Education Pro (consumer, verified students/faculty))
vs 
Gemini Notebook (formerly NotebookLM)Free tier
We wrote this from our own verified profiles of Perplexity (checked September 30) and Gemini Notebook (checked October 1); we ran no benchmark for this pair, and it uses no third-party benchmarks or vendor payment.
Pick Perplexity if your question needs the live web: it searches in real time and cites every answer. Pick Gemini Notebook (formerly NotebookLM) if the answer should come only from documents you upload, and you want study aids like Audio Overviews and Flashcards. Gemini Notebook has a free tier with up to 50 sources per notebook, and Perplexity has a free Standard plan with limited deeper search. Paid USD prices are not fully stated for Perplexity or Gemini Notebook: Perplexity Pro and Google AI Plus, Pro and Ultra have no confirmed price.
Based on our profiles of Perplexity (verified September 30) and Gemini Notebook, formerly NotebookLM (verified October 1), using official vendor pages; Perplexity's pricing page was blocked to our checks, and no benchmark was run.
If you only want the answer, this is the table. Everything below is the evidence from the two documented profiles.
| You want to | Use | Why |
|---|---|---|
| Get a quick answer with links to sources | Perplexity | Every Perplexity answer carries numbered citations to web sources. |
| Find the latest facts or news | Perplexity | Perplexity retrieves content from the web in real time as you ask. |
| Write a research report on a broad topic | Perplexity | Research mode runs many searches and writes a report you can export. |
| Study from my own class notes and readings | Gemini Notebook (formerly NotebookLM) | Gemini Notebook answers from the sources you upload and cites them. |
| Make flashcards for an exam | Gemini Notebook (formerly NotebookLM) | Gemini Notebook lists Flashcards built from uploaded material. |
| Get an audio recap to listen to on the go | Gemini Notebook (formerly NotebookLM) | Audio Overviews turn your sources into a spoken-style recap. |
| Review dozens of papers I already have | Gemini Notebook (formerly NotebookLM) | Gemini Notebook notebooks hold 50 sources free and up to 600 on Google AI Ultra. |
| Ask questions about one PDF | Either | Perplexity accepts PDFs up to 50 MB; Gemini Notebook answers from uploaded sources. |
| Turn research into slides | Either | Gemini Notebook generates Slides; Perplexity paid plans list presentations under Create files and apps. |
| Save an answer as a Word file | Perplexity | Perplexity exports answers as PDF, Markdown or DOCX; export formats are not stated for Gemini Notebook. |
| Plan | Tool | Price | Limits |
|---|---|---|---|
| Perplexity Standard (Free) | Perplexity | $0 | Practically unlimited basic searches; very limited Pro Search; limited Research |
| Perplexity Pro | Perplexity | Not stated | Extended Pro Search; up to 50 files per Space; 50 MB per file |
| Education Pro | Perplexity | $10/mo | Requires student or faculty verification |
| Perplexity Max | Perplexity | $200/mo ($2,000/yr) | 10,000 Computer credits per month; up to 500 files per Space |
| Enterprise Pro | Perplexity | $40/seat/mo ($400/yr) | Extended limits vs Pro; up to 500 files per Space; uploaded files kept 7 days |
| Enterprise Max | Perplexity | $325/seat/mo ($3,250/yr) | 15,000 Computer credits per month; 5,000 files per Space |
| API Platform (Search API) | Perplexity | $5 per 1,000 requests ($1 for Fast Search) | Search API: 50 query units per second |
| Gemini Notebook (free) | Gemini Notebook (formerly NotebookLM) | $0 | Standard limits; up to 50 sources per notebook |
| In Google AI Plus | Gemini Notebook (formerly NotebookLM) | Not stated | Double the standard usage limits; up to 100 sources per notebook |
| In Google AI Pro | Gemini Notebook (formerly NotebookLM) | Not stated | Four times the standard usage limits; up to 300 sources per notebook |
| In Google AI Ultra | Gemini Notebook (formerly NotebookLM) | Not stated | 5-20X the usage limits of Pro; up to 600 sources per notebook |
| Business / Education / Enterprise | Gemini Notebook (formerly NotebookLM) | Custom, via Google Workspace or Google Cloud | Organization data stays private; public sharing not enabled |
USD as published on each vendor's pricing page, checked Oct 1, 2026. Perplexity pricing in full · Gemini Notebook (formerly NotebookLM) pricing in full
| Perplexity | Gemini Notebook (formerly NotebookLM) | |
|---|---|---|
| Messages / rate limits | Not stated as numbers; Free is 'very limited' for Pro Search and 'limited' for Research; Pro is 'extended' | Standard limits on free; double on Plus, four times on Pro, 5-20X Pro on Ultra |
| Context / file size | Files up to 50 MB each; long files are sampled for relevant parts | File size limits: Not stated |
| Sources / files per workspace | Pro: 50 files per Space; Max and Enterprise Pro: 500; Enterprise Max: 5,000 | 50 free, 100 Plus, 300 Pro, 600 Ultra per notebook |
| Seats / team | Enterprise Pro and Max per-seat plans; Spaces with viewer and contributor roles | Via Google Workspace, Workspace for Education or Google Cloud; seat details Not stated |
| Feature | Perplexity | Gemini Notebook (formerly NotebookLM) |
|---|---|---|
| Web search | Yes, real time with citations | Not stated; Source Discovery and Deep Research find new sources |
| Answers from your own files | Yes: PDF, CSV, code, audio, video, images up to 50 MB | Yes, core feature: answers grounded in uploaded sources |
| Citations | Yes, numbered on every answer | Yes, though Google's help center notes citations are not always shown |
| Image generation | Yes, on paid plans | Not stated |
| Audio / video outputs | Short video generation on paid plans; voice dictation input | Audio Overviews and Video Overviews |
| Study aids and slides | Study Mode with flashcards on Education Pro | Flashcards, Reports, Slides and Infographics |
| Agents / tools | Computer (credit-based agent) and Comet browser | Not stated |
| API | Yes, separate pay-as-you-go | Not stated |
| Mobile apps | Yes (web, desktop, mobile) | Yes (web and mobile) |
| Perplexity | Gemini Notebook (formerly NotebookLM) | |
|---|---|---|
| Training on your data | Free, Pro, Max: queries and feedback may be used unless you turn off AI data retention; Enterprise: never | Individual: only if you submit feedback; organization and school data: never |
| Retention | Threads kept until you delete them; anonymous threads 14 days; thread files 90 days (7 days Enterprise) | Not stated |
| Business controls | SSO, SCIM, audit logs, configurable retention, SOC 2 Type II report | Data private to the organization or school; other controls Not stated |
Taken from each vendor's published policy pages at the time of our check. Policies change; the source links are at the bottom.
AI answer engine that searches the web and replies with cited sources, plus developer search APIs.
Free stops at: Practically unlimited basic searches, Very limited amount of Pro Searches
Verified perplexity.ai (opens Perplexity website in a new tab)
Free · paid from $10/mo US · checked Sep 30
Google's AI research partner that answers questions and creates summaries, audio and slides grounded in your own sources.
Free stops at: Standard limits for chat and generation of Slides, Audio Overviews and other artifacts, Up to 50 sources per …
Verified notebook.google (opens Gemini Notebook (formerly NotebookLM) website in a new tab)
Free plan available US price unconfirmed
Perplexity is better for web research and Gemini Notebook for your own documents. Perplexity searches the live web and cites its sources. Gemini Notebook (formerly NotebookLM) answers from the documents you upload to a notebook.
Yes, Perplexity and Gemini Notebook both have a free tier. Perplexity Standard offers practically unlimited basic searches, with limited Pro Search and Research. Gemini Notebook is free with standard usage limits and up to 50 sources per notebook.
Perplexity Max is $200/mo, Education Pro is $10/mo and Enterprise Pro is $40 per seat per month; the consumer Pro price is not confirmed. Gemini Notebook paid tiers come with Google AI Plus, Pro and Ultra, and their USD prices are not stated.
Perplexity may use Free, Pro and Max data for training unless you opt out; Enterprise is never used. Google says individual use is not used for training unless you submit feedback, and organization or school data is never used.
Only official vendor pages. No third-party benchmarks, forum threads or press were used. How we review.
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